Moderate earthquake 5.4 mag, 178 km S of `Ohonua, Tonga

A moderate earthquake magnitude 5.4 (ml/mb) has occurred on Saturday, 178 km S of `Ohonua, Tonga (111 miles). The temblor was detected at 13:53:19 / 1:53 pm (local time epicenter). Exact location, longitude -174.8562° West, latitude -22.9401° South, depth = 5.01 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of event in UTC/GMT: 25/03/18 / 2018-03-25 01:53:19 / March 25, 2018 @ 1:53 am. Id of earthquake: us1000d8sa. Event ids that are associated: us1000d8sa. The earthquake occurred at a depth of 5.01 km (3 miles).

Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days three and in the last 365 days twenty-one earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 1320 moderate quakes in the world.

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What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 178 km S of `Ohonua, Tonga.

`Ohonua Tonga

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Parameter	Value	Description
Magnitude	5.4 mb	The magnitude for the event.
Longitude	-174.8562° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-22.9401° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	5.01 km	Depth of the event in kilometers.
Place	178km S of `Ohonua, Tonga	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2018-03-25 01:53:19	Time when the event occurred. UTC/GMT
Updated	2018-03-25 02:22:00	Time when the event was most recently updated. UTC/GMT
Timezone offset	-720	Timezone offset from UTC in minutes at the event epicenter.
Felt		The total number of felt reports
CDI		The maximum reported intensity for the event.
MMI		The maximum estimated instrumental intensity for the event.
Alert Level		The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status	reviewed	Indicates whether the event has been reviewed by a human.
Tsunami	0	This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG	449	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	us	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,us,	A comma-separated list of network contributors.
Number of Stations Used		The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	5.998	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.98 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	45	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	mww	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	us1000d8sa	Id of event.
Event Code	1000d8sa	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us1000d8sa,	A comma-separated list of event ids that are associated to an event.

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Moderate earthquake 5.4 mag, 178 km S of `Ohonua, Tonga

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